<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - simple text from json</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
		<style>
			body {
				background-color: #f0f0f0;
				color: #444;
			}
			a {
				color: #08f;
			}
		</style>
	</head>
	<body>
		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - simple text from json fonts
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { SVGLoader } from 'three/addons/loaders/SVGLoader.js';
			import { FontLoader } from 'three/addons/loaders/FontLoader.js';

			let camera, scene, renderer;

			init();

			function init( ) {

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.set( 0, - 400, 600 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xf0f0f0 );

				const loader = new FontLoader();
				loader.load( 'fonts/helvetiker_regular.typeface.json', function ( font ) {

					const color = new THREE.Color( 0x006699 );

					const matDark = new THREE.MeshBasicMaterial( {
						color: color,
						side: THREE.DoubleSide
					} );

					const matLite = new THREE.MeshBasicMaterial( {
						color: color,
						transparent: true,
						opacity: 0.4,
						side: THREE.DoubleSide
					} );

					const message = '   Three.js\nStroke text.';

					const shapes = font.generateShapes( message, 100 );

					const geometry = new THREE.ShapeGeometry( shapes );

					geometry.computeBoundingBox();

					const xMid = - 0.5 * ( geometry.boundingBox.max.x - geometry.boundingBox.min.x );

					geometry.translate( xMid, 0, 0 );

					// make shape ( N.B. edge view not visible )

					const text = new THREE.Mesh( geometry, matLite );
					text.position.z = - 150;
					scene.add( text );

					// make line shape ( N.B. edge view remains visible )

					const holeShapes = [];

					for ( let i = 0; i < shapes.length; i ++ ) {

						const shape = shapes[ i ];

						if ( shape.holes && shape.holes.length > 0 ) {

							for ( let j = 0; j < shape.holes.length; j ++ ) {

								const hole = shape.holes[ j ];
								holeShapes.push( hole );

							}

						}

					}

					shapes.push.apply( shapes, holeShapes );

					const style = SVGLoader.getStrokeStyle( 5, color.getStyle() );

					const strokeText = new THREE.Group();

					for ( let i = 0; i < shapes.length; i ++ ) {

						const shape = shapes[ i ];

						const points = shape.getPoints();

						const geometry = SVGLoader.pointsToStroke( points, style );

						geometry.translate( xMid, 0, 0 );

						const strokeMesh = new THREE.Mesh( geometry, matDark );
						strokeText.add( strokeMesh );

					}

					scene.add( strokeText );

					render();

				} ); //end load function

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				document.body.appendChild( renderer.domElement );

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 0, 0 );
				controls.update();

				controls.addEventListener( 'change', render );

				window.addEventListener( 'resize', onWindowResize );

			} // end init

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				render();

			}

			function render() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
